Roy Lichtenstein was, as Robert Hughes noted in Time magazine, "a postmodernist before the term got going." The artist, as much identified with the American Pop art movement as was Andy Warhol, "realized that in art, though style may not be everything, everything is style," according to Hughes. Famous for his gigantic pastiches on scenes from comic books and comic strips, Lichtenstein left such pictures behind in 1965, thereafter concentrating on numerous other styles and media from Abstract Expressionism to sculpture. As Elizabeth C. Baker noted in Art in America at the time of the artist's death in 1997, Lichtenstein had "produced an enormous--and enormously influential--body of work in the thirty-five years since he gained public recognition." Baker further explained, "As one of the principal inventors of Pop art, he changed not only art's visual language, but also its social frame of reference. He played an unusual double role--he developed...